<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>relationmap</title>
<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1">
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="Cache-Control" content="no-cache, must-revalidate">
<script src="./assets/js/d3.min.js"></script>
<script src="./assets/js/vis.min.js"></script>
</head>
<body>
  <div id="map"></div>
    <div id="load_data">
      <section class="text-center" style="width:150px;height:150;margin-top:50px;position:absolute;top:40%;left:47%;text-align:center"> <img src="./assets/img/loading.gif" > <p style="text-align:center">加载数据中...</p></section>

    </div>
    <div class="vis-network">
        <div id="button_box" class="vis-navigation">
          <a type="button" class="btn btn-default btn-circle download"><img src="./assets/img/download.png"></a>
          <a type="button" class="btn btn-default btn-circle refresh"><img src="./assets/img/refresh.png"></a>
      </div>
    </div>
</body>
</html>